// simplePreload( '01.gif', '02.gif' ); 
function simplePreload() { 
  var args = simplePreload.arguments;
  document.imageArray = new Array(args.length);
  for(var i=0; i<args.length; i++) {
    document.imageArray[i] = new Image;
    document.imageArray[i].src = args[i];
  }
}

// Example: obj = findObj("image1");
function findObj(theObj, theDoc) {

  var p, i, foundObj;

  if(!theDoc) theDoc = document;
  if( (p = theObj.indexOf("?")) > 0 && parent.frames.length) {
    theDoc = parent.frames[theObj.substring(p+1)].document;
    theObj = theObj.substring(0,p);
  }

  if(!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj];
  for (i=0; !foundObj && i < theDoc.forms.length; i++) 
    foundObj = theDoc.forms[i][theObj];
  for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) 
    foundObj = findObj(theObj,theDoc.layers[i].document);
  if(!foundObj && document.getElementById) foundObj = document.getElementById(theObj);

  return foundObj;
}

function switchBackgroundImage(objName, imgSrc) {
	var tmpObj = findObj(objName);
	
	tmpObj.style.backgroundImage = 'url('+imgSrc+')';
}

function switchImage(imgName, imgSrc)  {
	if (document.images) {
		if (imgSrc != "none") {
			document.images[imgName].src = imgSrc;
		}
	}
}

// Kan brukes (av fragmenter) for å hekte funksjoner på onLoad
function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            if (oldonload) {
                oldonload();
            }
            func();
        }
    }
}